EXERCISE. 207 



repletion and evacuation; which may (avoid- 

 ing technical defcription, and profeffional 

 minutise) be concifely explained and clearly 

 underftood, as matter necelTarily introdudlory 

 to what we proceed to inculcate, upon the 

 palpable confiflency of conftant and moderate 

 exercife for the ellablifliment of health and 

 promotion of condition. 



I believe it has been before faid, in either 

 this or the former volume, that the ali- 

 ment, after fufficient maflication in the a<5 

 of chewing, is paffed to the ftomach, w^here 

 it undergoes a regular fermentation (in ge- 

 neral termed digeftion) producing a certain 

 quantum of chyle, in proportion to the nutria 

 the property of the aliment fo retained : this 

 chyle, in its procefs of nature, (which has 

 been before accurately explained) becomes 

 wonderfully fubfervient to all the purpofes of 

 life and fupport in its general contribution to 

 the fource of circulation, and the various fe- 

 cretions j while the groffer parts (from which 

 the nutritious property is extradled in their 

 progreft through the ilomach and inteftinal 

 canal) are thrown oif from the body by ex- 

 crementitious evacuations. 



4 This 



